Munger Jr., from Palo Alto., Calif., has donated nearly $100 million to campaigns on ballot measures since 2003 and more than $1.5 million this year to the Republican Party.
He also is involved in a lawsuit that illustrates a split between the party's conservative and less-conservative wings, with Munger on the less-conservative side. His father, also a Republican, is vice chairman of Berkshire Hathaway Inc. of Omaha and lives in Southern California.
